Sec Form 4 Filing - Magnetar Financial LLC @ CoreWeave, Inc.

Insider filing report for Changes in Beneficial Ownership

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FORM 4

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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3235-0287

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1. Name and Address of Reporting Person

Magnetar Financial LLC

2. Issuer Name and Ticker or Trading Symbol
CoreWeave, Inc. [ CRWV]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

_____ Director	X __ 10% Owner
_____ Officer (give title below)	_____ Other (specify below)

(Last)

(First)

(Middle)

1603 ORRINGTON AVENUE, 13TH FLOOR

3. Date of Earliest Transaction (MM/DD/YY)
03/20/2026

(Street)

EVANSTON, IL60201

4. If Amendment, Date Original Filed (MM/DD/YY)

6. Individual or Joint/Group Filing (Check Applicable Line)
_____ Form filed by One Reporting Person
__ X __ Form filed by More than One Reporting Person

(City)

(State)

(Zip)

**Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned**
1.Title of Security (Instr. 3)	2. Transaction Date (MM/DD/YY)	2A. Deemed Execution Date, if any (MM/DD/YY)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

**Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned**
( *e.g.* , puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (MM/DD/YY)	3A. Deemed Execution Date, if any (MM/DD/YY)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)		6. Date Exercisable and Expiration Date (MM/DD/YY)		7. Title and Amount of Underlying Securities (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (MM/DD/YY)	3A. Deemed Execution Date, if any (MM/DD/YY)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			205,695	03/20/2026	03/20/2026	Class A Common Stock	205,695	$ 0	235,080	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 5 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			205,695	03/20/2026	03/20/2026	Class A Common Stock	205,695	$ 0	235,080	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 5 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			26,968	03/20/2026	03/20/2026	Class A Common Stock	26,968	$ 0	30,820	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 6 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			26,968	03/20/2026	03/20/2026	Class A Common Stock	26,968	$ 0	30,820	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 6 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			2,787	03/20/2026	03/20/2026	Class A Common Stock	2,787	$ 0	3,187	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 7 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			2,787	03/20/2026	03/20/2026	Class A Common Stock	2,787	$ 0	3,187	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 7 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			60,115	03/20/2026	03/20/2026	Class A Common Stock	60,115	$ 0	68,703	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 8 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			60,115	03/20/2026	03/20/2026	Class A Common Stock	60,115	$ 0	68,703	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 8 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			82,531	03/20/2026	03/20/2026	Class A Common Stock	82,531	$ 0	94,321	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 9 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			82,531	03/20/2026	03/20/2026	Class A Common Stock	82,531	$ 0	94,321	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 9 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			103,451	03/20/2026	03/20/2026	Class A Common Stock	103,451	$ 0	118,230	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 10 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			103,451	03/20/2026	03/20/2026	Class A Common Stock	103,451	$ 0	118,230	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 10 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			23,374	03/20/2026	03/20/2026	Class A Common Stock	23,374	$ 0	26,713	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 11 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			23,374	03/20/2026	03/20/2026	Class A Common Stock	23,374	$ 0	26,713	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 11 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			88,000	03/20/2026	03/20/2026	Class A Common Stock	88,000	$ 0	100,572	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 12 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			88,000	03/20/2026	03/20/2026	Class A Common Stock	88,000	$ 0	100,572	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 12 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			54,235	03/20/2026	03/20/2026	Class A Common Stock	54,235	$ 0	61,982	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 13 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			54,235	03/20/2026	03/20/2026	Class A Common Stock	54,235	$ 0	61,982	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 13 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			43,690	03/20/2026	03/20/2026	Class A Common Stock	43,690	$ 0	49,931	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 14 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			43,690	03/20/2026	03/20/2026	Class A Common Stock	43,690	$ 0	49,931	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 14 )}
Call option (obligation to sell)	$ 160	03/20/2026		E/K^{( 1 )}			9,154	03/20/2026	03/20/2026	Class A Common Stock	9,154	$ 0	10,461	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 15 )}
Put option (right to sell)	$ 70	03/20/2026		E/K^{( 1 )}^{( 16 )}			9,154	03/20/2026	03/20/2026	Class A Common Stock	9,154	$ 0	10,461	I	Footnotes ^{( 2 )} ^{( 3 )} ^{( 4 )} ^{( 15 )}

**Reporting Owners**
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Magnetar Financial LLC 1603 ORRINGTON AVENUE 13TH FLOOR EVANSTON, IL60201		X
Magnetar Capital Partners LP 1603 ORRINGTON AVENUE 13TH FLOOR EVANSTON, IL60201		X
Supernova Management LLC 1603 ORRINGTON AVENUE 13TH FLOOR EVANSTON, IL60201		X
Snyderman David J. 1603 ORRINGTON AVENUE 13TH FLOOR EVANSTON, IL60201		X

**Signatures**
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC, which is the General Partner of Magnetar Capital Partners LP, which is in turn the Sole Member of Magnetar Financial LLC		03/20/2026
Signature of Reporting Person		Date
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC, which is the General Partner of Magnetar Capital Partners LP		03/20/2026
Signature of Reporting Person		Date
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman, as Administrative Manager of Supernova Management LLC		03/20/2026
Signature of Reporting Person		Date
/s/ Hayley A. Stein, Attorney-in-Fact for David J. Snyderman		03/20/2026
Signature of Reporting Person		Date

Explanation of Responses:

( 1 )In connection with the expiration of a call option and a put option entered into on August 22, 2025, as part of a collar arrangement, both options expired unexercised and for no value on March 20, 2026, as the closing price of the Class A Common Stock on such date was between the call strike price and the put strike price.
( 2 )Magnetar Financial LLC ("Magnetar Financial") serves as the investment adviser to each of CW Opportunity LLC, Magnetar Capital Master Fund, Ltd, Magnetar Constellation Master Fund, Ltd, Magnetar Longhorn Fund LP, Magnetar SC Fund Ltd, Magnetar Xing He Master Fund Ltd, Purpose Alternative Credit Fund - F LLC, and Purpose Alternative Credit Fund - T LLC, the general partner of Magnetar Structured Credit Fund, LP and the manager of Magnetar Alpha Star Fund LLC and Magnetar Lake Credit Fund LLC (collectively, the "Magnetar Funds").
( 3 )Magnetar Capital Partners LP ("Magnetar Capital Partners") is the sole member and parent holding company of Magnetar Financial. Supernova Management LLC ("Supernova Management") is the general partner of Magnetar Capital Partners. The administrative manager of Supernova Management is David J. Snyderman, a citizen of the United States of America.
( 4 )Each of the Magnetar Funds, Magnetar Financial, Magnetar Capital Partners, Supernova Management and David J. Snyderman disclaims beneficial ownership of these shares of Common Stock of the Issuer, except to the extent of its or his pecuniary interest therein.
( 5 )These securities are held directly by CW Opportunity LLC.
( 6 )These securities are held directly by Magnetar Alpha Star Fund LLC.
( 7 )These securities are held directly by Magnetar Capital Master Fund, Ltd.
( 8 )These securities are held directly by Magnetar Constellation Master Fund, Ltd.
( 9 )These securities are held directly by Magnetar Lake Credit Fund LLC.
( 10 )These securities are held directly by Magnetar Longhorn Fund LP.
( 11 )These securities are held directly by Magnetar SC Fund Ltd.
( 12 )These securities are held directly by Magnetar Structured Credit Fund, LP.
( 13 )These securities are held directly by Magnetar Xing He Master Fund Ltd.
( 14 )These securities are held directly by Purpose Alternative Credit Fund - F LLC.
( 15 )These securities are held directly by Purpose Alternative Credit Fund - T LLC.
( 16 )Expiration of a long derivative security for no value, transaction code "K" only.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Sec Form 4 Filing - Magnetar Financial LLC @ CoreWeave, Inc. - 2026-03-20